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8.6.
Hi-Fi AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM
R
:TO POWER SUPPLY/RF SECTION
S
:TO SYSTEM CONTROL & SERVO SECTION
V
:TO LUMINANCE & CHROMINANCE/AUDIO SECTION
I
:TO INPUT/OUTPUT SECTION
D
:TO DECODER SECTION
G
S
MUTE
H
S
SYS IIC CLOCK
S
SYS IIC DATA
V
FSC
F
I
AV2 A OUT (R)
I
AV2 A OUT (L)
I
AV1 A OUT (R)
E
I
AV1 A OUT (L)
R
PS 5V
R
PS 12V
R
GND
D
V
AUDIO IN (N)
V
AUDIO OUT (N)
C
R
RFC AUDIO OUT
S
RFC MUTE
H
B
I
AV3 A IN (R)
I
AV3 A IN (L)
D
TUNER AUDIO (R)
I
AV1 A IN (R)
I
AV2 A IN (R)
D
TUNER AUDIO (L)
I
AV1 A IN (L)
I
AV2 A IN (L)
V
AUDIO HEAD COM
V
AUDIO HEAD R
V
AUDIO HEAD L
S
A.HEAD SW
S
ABS NORMAL
L
S
D.FM REC
H
A
NOTE:THE MEASUREMENT MODE OF THE DC VOLTAGE IN THE BRACKETS( )ON THIS DIAGRAM IS RECORD MODE
WITH PAL COLOUR SIGNAL.(SP MODE)
1
AUDIO MAIN SIGNAL PATH IN REC MODE
QR4503
XN0121600L
(MUTE)
0
2
A3
A2
A1
1
0
QR4504
XN0121600L
(MUTE)
0
2
1
0
L4503
10u
QR4502
UN2113
(BUFFER)
0
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
2
3
A4
L4502
1.2u
C4525
6V100
QR4501
UN2113
(BUFFER)
0
-0.3
-0.3
3
0.2
4
5
0.5
-0.3
R4533
C4530
220
16V10
6.0
R4531
C4531
220
16V10
6.0
R4535
C4532
220
16V10
6.0
0
C4544
100P
-0.3
3
4
5
0
-0.3
C4545
100P
R4538
C4533
220
16V10
6.0
12.3
C4539
C4534
R4543
C4535
0.1
16V47
220
16V10
6.0
R4537
C4536
10K
16V22
0.7
2.4
R4540
C4538
22K
0.1
2.4
R4539
3600
0
0
0
QR4507
-0.4
UN2216
(MUTE)
IC4501
AN3656NFBPBV
THE MEASUREMENT MODE OF THE DC VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRAM IS PL
WITH PAL COLOUR SIGNAL.(SP MODE)
4
AUDIO MAIN SIGNAL PATH IN PLAYBAC
A1
C6526
0.1
2.5
2.5
4.7
1.5
48
47
46
45
49
50
SWITCH
51
RCH
SWITCH
52
LCH
53
54
55
GND
56
57
58
VCC2
59
DET
60
NORMAL
61
OUTPUT
SWITCH
62
63
64
1
2
3
4
2.3
0
2.3
0
C4540
C4541
0.1
0.1
B1
B2
5
A2
A3
C4529
R4526
R4525
16V10
1K
1K
3.2
2.8
2.9
44
43
42
4
IIC BUS
INTERFACE
OUTPUT
SELECT
SWITCH
RCH
+
OUTPUT
SELECT
SWITCH
LCH
INPUT SWIT
5
6
7
0
2.4
2.0
C4501
C4502
16V10
16V10
B
6
52
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